Omega CN4420 Series User manual
TABLE OF CONTENTS
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Model Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Outer Dimensions and Panel Cutout Size . . . . . . . . . . . . . . . . . . . . . . . 15
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Wiring Instructions: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Front Panel Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Front Panel Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Autotuning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Programming
1. Set Up Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
2. System Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Appendix A: Autotuning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Appendix B: Manual Tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Appendix C: Heater Burnout Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Appendix D: Heat/Cool Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Quick Reference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
2
INTRODUCTION
The OMEGA CN4420, CN4520, CN4620, and CN4720 Series controllers
are economical process controllers that accept temperature or process
inputs, and have sophisticated control capabilities, providing on/off
control, PID, or autotune PID, with Fuzzy Logic. The controllers have
common features, but differ in panel-size requirements. They are avail-
able with mechanical relay, 24 VDC SSR driver, or 4-20 mA output. They
also come with an 8-segment ramp/soak function.
The CN4420 units have single digital display for indication of process/
setpoint values. These are available with a single control output and
optional process alarm. They are used in conjunction with a socket.
The CN4520, CN4620, and CN4720 units have dual digital displays for
simultaneous indication of process value and setpoint. These units are
available with either single or dual outputs; dual output models can be
used for heat/cool, heat/heat or cool/cool control. Options available
include dual alarms (user-selectable between high/low and deviation
action), as well as an inoperative-heater alarm. The heater alarm is a
1A mechanical relay that is triggered when the heater current trans-
former senses that the heater is not getting power.
3
FEATURES
• Fuzzy Logic Control
• PID Autotune with manual over-
ride - heating or cooling
• Programmable control action -
reverse or direct
• Programmable cycle time
• Programmable inputs - Thermo-
couple/RTD or
DC Current/Voltage
• Sensor burn-out protection
• Zero/span calibration
• Outputs: Relay, Solid-state relay
drive, and 4-20mA DC
• Secondary output for
cooling (optional)
• High/low alarm
outputs (optional)
• Heater burnout alarm (optional)
(only on CN4520, CN4620,
CN4720)
• Menu driven format
• Setting – touch keys on front
panel
• Programmable 8-segment
ramp/soak function
• Digital filtering (to suppress
factory noise)
• Adjustable setpoint range
• Selectable °F/°C
• Offset adjustments
• Programmable decimal point
• Programmable lock feature
• Advanced security options to
prevent unauthorized para-
meter changes
• 4-digit, LED indication
• Output status indication
• Fault indication
• Non-volatile memory
• 1/16, 1/8, 1/4 DIN and 72mm
panel mount package
• NEMA 4X faceplate
• ABS plastic housing
• Termination– screw-down type
(CN4520, CN4620, CN4720) or
socket with screw-down
terminals (CN4420)
• Metal mounting bracket; plastic
bracket for CN4420
• 85 to 264V AC free voltage
power supply
• 24V AC/DC power supply
(optional)
• UL, C-UL recognized
• CE approved
4
SAFETY PRECAUTIONS
Before using this product, the user is requested to read the following
precautions carefully to ensure safety. The safety requirements are
classified as either “warning” or “caution” according to the following
explanations:
Warning
Wiring
1. If there is danger of serious accident resulting from a failure or
defect in this unit, provide the unit with an appropriate external
protective circuit to prevent an accident.
2. The unit is normally supplied without a power switch or a fuse. Use
power switch and fuse as required (Rating of the fuse: 250V, 1A)
Power supply
1. Be sure to use the rated power supply voltage to protect the unit
against damage and to prevent failure.
2. Keep the power off until all of the wiring is completed so that electric
shock and trouble with the unit can be prevented.
General
1. Never attempt to disassemble, modify, or repair this unit. Tampering
with the unit may result in malfunction, electric shock, or fire.
2. Do not use the unit in combustible or explosive gaseous atmos-
pheres.
Warning suggesting that the user's mishandling can
result in personal death or serious injury.
Caution
suggesting that the user's mishandling can result
in personal injury or damage to the property.
5
Caution
Installation
1. Avoid installing the unit in places where:
• the ambient temperature may reach beyond the range of -10 to 50°C
(14 to 122°F) while in operation
• the humidity may reach higher than 90% RH while in operation
• a change in the ambient temperature is so rapid as to cause
condensation
• corrosive gases (sulfide and ammonia gas, in particular) or
combustible gases are emitted
• the unit is subject to vibration or shock
• the unit is likely to come in contact with water, oil, chemicals, steam,
or vapor
• the unit is exposed to dust, salt, or air containing iron particles
• the unit is subject to interference with static electricity, magnetism,
or noise
• the unit is exposed to direct sunlight
• heat may be accumulated due to radiation
Maintenance
1. Do not use organic solvents such as alcohol or benzene to wipe this
unit. Use a neutral detergent.
6
UNPACKING
Remove the packing list and verify that you have received all equipment,
including the following (quantities in parenthesis):
• Process controller (1)
• Mounting bracket (1)
• Socket with CN4420 (1)
• Operator’s manual (1)
• Waterproof gasket (1)
• 250Ωprecision resistor (when required) (1)
• Current transformer (when required) (1)
If you have any questions about the shipment please call the OMEGA
Customer Service Department.
When you receive the shipment, inspect the container and equipment for signs
of damage. Note any evidence of rough handling in transit. Immediately report
any damage to the shipping agent.
Note:
The carrier will not honor damage claims unless all shipping materials are
saved for inspection. After examining and removing contents, save packing
material and carton in the event reshipment is necessary.
7
MODEL DESCRIPTION
Single Output Models
_________________________________________________________________
CN4421(*)-(**) 1/16 DIN controller
CN4521(*)-(**) 1/8 DIN controller
CN4621(*)-(**) 1/4 DIN controller
CN4721(*)-(**) 72 mm sq. controller
_________________________________________________________________
Dual Output Models
_________________________________________________________________
CN4522(*)-(**)-(***) 1/8 DIN controller
CN4622(*)-(**)-(***) 1/4 DIN controller
CN4722(*)-(**)-(***) 72 mm sq. controller
_________________________________________________________________
* Specify TR for Thermocouple/RTD input or CV for current/voltage input
** Specify first output code from Output Options table below
*** Specify second output code from Output Options table below
OUTPUT OPTIONS
_________________________________________________________________
Option Type First Output Second Output*
_________________________________________________________________
Relay -R1 -R2
DC SSR driver -D1 -D2
4-20 mA -F1 -F2
_________________________________________________________________
* Available on CN4522, 4622, and 4722 models only
ALARM OPTION FOR CN4421
_________________________________________________________________
-A Single alarm
ALARM OPTIONS FOR CN4520, 4620, AND 4720 SERIES
_________________________________________________________________
-A2 Dual alarms
-H30* Heater burnout alarm, includes 0 to 30A current transformer
-H50* Heater burnout alarm, includes 20 to 50A current transformer
_________________________________________________________________
* Not available with options F1 or F2
All alarm relays share the same common
Both process and heater burnout alarm can be selected at the same time
LOW VOLTAGE POWER SUPPLY OPTION
_________________________________________________________________
-24V 24V AC/DC, 50/60 Hz
MODEL CONFIGURATION
SPECIFICATIONS
INPUT RANGE TABLE:
_________________________________________________________
Input Signal Input Range Input Range Remarks
(°C) (°F)
_________________________________________________________
Thermocouple*
J 0 ~ 800 32 ~ 1472 Cold Junction
K 0 ~ 1200 32 ~ 2192 compensating
R 0 ~ 1600 32 ~ 2912 function built-in
B 0 ~ 1800 32 ~ 3272
S 0 ~ 1600 32 ~ 2912
T -199 ~ 200 -328 ~ 392
T -150 ~ 400 -238 ~ 752
E -199 ~ 800 -328 ~ 1472
N 0 ~ 1300 32 ~ 2372
PL2 0 ~ 1300 32 ~ 2372
_________________________________________________________
RTD*
Pt100 -150 ~ 850 -238 ~ 1562 Allowable wiring
α= .00385 resistance 10 ohms
max (per wire).
_________________________________________________________
DC Voltage/
Current**
1-5V Scaling Range: -1999 to 9999 For current input, use
0-5V Engineering the 250Ω resistor to
4-20mA units obtain 1-5V DC or
0-20mA 0-5V DC input.
_________________________________________________________
* For TR models
** For CV models
See also the description for parameter P-n2 in the programming section, on
how to program for a particular input.
8
9
CONTROL FUNCTION
(SINGLE OUTPUT)
_________________________________________________________
Control action PID control with auto-tuning
Fuzzy control with auto-tuning
_________________________________________________________
Proportional band (P) 0-999.9% of full scale (FS), setting in 0.1% steps
_________________________________________________________
Integral time (I) 0-3200 sec, setting in 1 sec steps
_________________________________________________________
Differential time (D) 0-999.9 sec, setting in 0.1 sec steps
_________________________________________________________
P,I,D = 0: On/off action
I,D = 0: Proportional action
_________________________________________________________
Proportional cycle 1-150 sec, setting in 1 sec steps, for relay contact
output and DC SSR driver output only
_________________________________________________________
Hysteresis width 0-50% FS, setting in 1 E.U.(Engineering Units) steps
On/Off action only
_________________________________________________________
Anti-reset wind up 0-100% FS, setting in 1 E.U. steps, auto-setting
with auto-tuning
_________________________________________________________
Input sampling cycle 0.5 sec
_________________________________________________________
CONTROL FUNCTION
(DUAL OUTPUT) (Heat/Cool Type) CN4522, CN4622, CN4722 only
_________________________________________________________
Heating Proportional band P x 1/2 (P= 0-999.9%)
_________________________________________________________
Cooling Proportional band Heating proportional band x Cooling proportional
band coefficient
Cooling proportional band coefficient= 0-100
0: On/Off action
_________________________________________________________
Integral time 0-3200 sec for heating and cooling
_________________________________________________________
Differential time 0-999.9 sec for heating and cooling
_________________________________________________________
10
_________________________________________________________
P,I,D= 0: On/Off action (without dead band) for heating and cooling
I,D= 0: Proportional action
_________________________________________________________
Proportional cycle 1-150 sec, for relay contact output and DC SSR
driver output only
_________________________________________________________
Hysteresis width On/Off action for heating and cooling: 0.5% FS
On/Off action for cooling: 0.5% FS
_________________________________________________________
Anti-reset wind-up 0-100% FS, setting in 1 E.U. steps, auto-setting
with auto-tuning
_________________________________________________________
Overlap/dead band ±50% of heating proportional band
_________________________________________________________
Input sampling cycle 0.5 sec
_________________________________________________________
OUTPUT
(Single Output)
_________________________________________________________
Control output One of the following three types is selected:
(1) Relay contact (SPDT)
220V AC/30V DC, 3A (resistive load)
Mechanical life: 107times (under no load)
Electrical life: 105times (under the rated load)
(2) DC SSR driver (voltage pulse):
15-30V DC at ON/0.5V DC or less at OFF.
Current: 60mA or less.
(3) 4-20mA DC:
Allowable load resistance– 600Ωor less.
_________________________________________________________
This manual suits for next models
3
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